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Finding the Fourth Proportional to 138,872, 208,343.52 and 40,376

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Solution

The fourth proportional to 138,872, 208,343.52 and 40,376 is: 60,574.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872 : 208,343.52 = 40,376 : x
  2. Step 2: Convert to fraction form
    138,872/208,343.52 = 40,376/x
  3. Step 3: Cross multiply
    138,872x = 208,343.52 × 40,376
  4. Step 4: Simplify right side
    138,872x = 8,412,077,963.52
  5. Step 5: Solve for x
    x = 8,412,077,963.52/138,872
  6. Step 6: Final answer
    x = 60,574.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.